Polarization ya laser

Polarization ya laser

"Polarization" ndi chikhalidwe chodziwika bwino cha lasers osiyanasiyana, chomwe chimatsimikiziridwa ndi mfundo ya mapangidwe a laser. Themtundu wa laseramapangidwa ndi analimbikitsa cheza cha kuwala-emitting sing'anga particles mkatilaser. Kulimbikitsidwa kwa ma radiation kumakhala ndi khalidwe lochititsa chidwi: pamene photon yakunja igunda kachigawo kakang'ono kamene kali ndi mphamvu zambiri, tinthu tating'onoting'ono timatulutsa photon ndikusintha kupita ku mphamvu yochepa. Ma photons opangidwa munjirayi ali ndi gawo lomwelo, njira yofalitsa komanso polarization state monga ma photons akunja. Mtsinje wa photon ukapangidwa mu laser, ma photon onse mu mode photon stream amagawana gawo lomwelo, njira yofalitsa, ndi polarization state. Choncho, laser longitudinal mode (mafupipafupi) ayenera polarized.

Sikuti ma lasers onse ali ndi polarized. Mkhalidwe wa polarization wa laser umakhudzidwa ndi zinthu zingapo, kuphatikiza:
1. Kuwonetsera kwa resonator: Pofuna kuonetsetsa kuti ma photon ambiri akupezeka kuti apange ma oscillation okhazikika m'kati mwake ndikupangakuwala kwa laser, kumapeto kwa resonator nthawi zambiri kumakutidwa ndi filimu yowonetsera bwino. Malinga ndi lamulo la Fresnel, machitidwe a filimu yowunikira zinthu zambiri imapangitsa kuti kuwala komaliza kusinthe kuchokera ku kuwala kwachilengedwe kupita ku mzere.polarized kuwala.
2. Makhalidwe a sing'anga phindu: m'badwo laser zachokera analimbikitsa cheza. Ma atomu okondwa akamawulutsa mafotoni pansi pa chisangalalo cha mafotoni akunja, mafotoni awa amanjenjemera mbali imodzi (polarization state) ngati mafotoni akunja, zomwe zimapangitsa kuti laser ikhalebe yokhazikika komanso yapadera ya polarization. Ngakhale kusintha kwakung'ono mu chikhalidwe cha polarization kudzasefedwa ndi resonator chifukwa oscillations okhazikika sangathe kupangidwa.

Mu njira yeniyeni yopangira laser, mbale yoweyula ndi polarization crystal nthawi zambiri amawonjezeredwa mkati mwa laser kuti akonze kukhazikika kwa resonator, kuti polarization state mumtsempha ikhale yapadera. Izi sizimangopangitsa kuti mphamvu ya laser ikhale yokhazikika, kusangalatsa kosangalatsa kumakhala kokulirapo, komanso kumapewa kutayika komwe kumachitika chifukwa cha kulephera kwa oscillate. Chifukwa chake, mawonekedwe a polarization a laser amadalira zinthu zambiri monga kapangidwe ka resonator, mtundu wa njira yopezera ma oscillation, ndipo sizikhala zapadera.